使用基于酒精的DESs进行燃料的氧化脱硫
Nisha Saini1, Mansi Negi2, Pooja Yadav3
1CSIR-Indian Institute of Petroleum Dehradun, Dehradun, Uttarakhand, India. nisha@iip.res.in.
概括
新的深溶解剂 (DES) 有效地从燃料中去除耐火硫化合物. 酸:TEG [1:7] DES通过氧化提取实现了超过98%的硫去除,为传统的脱硫提供了一个有希望的替代方案.
科学领域:
- 环境化学环境化学
- 绿色化学 绿色化学
- 石油工程是石油工程中的一个.
背景情况:
- 燃料油中的硫化合物释放有毒的二氧化硫,这是全球环境的一个主要问题.
- 传统的水解硫化 (HDS) 方法不足以去除耐火硫化合物,如硫烯 (BT),二硫烯 (DBT) 和4-甲基二硫烯 (4-MDBT).
- 开发先进的脱硫技术对于生产更清洁的燃料至关重要.
研究的目的:
- 为了合成和表征新型的深溶剂 (DES) 以提高燃料脱硫.
- 评估合成的DESs在从模型和柴油燃料中提取耐火硫化合物的效率.
- 研究DES提取和氧化脱硫的综合作用,以深度去除硫.
主要方法:
- 使用不同的键受体 (例如,酸,酸) 和捐赠体 (例如,三乙烯糖醇-TEG) 合成各种DES.
- 描述DES特性,包括密度,粘度,折射率和FTIR光谱.
- 使用选定的DES从模型油和柴油中提取硫化合物,然后使用过氧化进行氧化脱硫.
主要成果:
- [酸:TEG] [1:7]和[酸:TEG] [1:8]的DES配方显示出显著的硫除去效率.
- 在30°C的单阶段提取过程中,从模型油中分别去除了高达44.07%和42.53%的硫.
- 连续提取将去除率提高到85%以上,而氧化提取则从含DBT的模型油中获得了高达98.98%的[酸:TEG] [1:7]和96.96%的[酸:TEG] [1:8]的效率.
结论:
- 深层欧溶剂,特别是[酸:TEG] [1:7],在燃料的深层脱硫中表现出卓越的性能.
- 提取DES和氧化脱硫的组合提供了一种高效和有前途的方法来去除耐火硫化合物.
- 这些发现为生产超低硫燃料提供了一个可行的,环保的替代传统HDS.
相关概念视频
02:37Oxidation of Alcohols
13.0K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.0K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.1K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.1K
01:46Oxidative Cleavage of Alkenes: Ozonolysis
10.3K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.3K
01:33Preparation of Aldehydes and Ketones from Alcohols, Alkenes, and Alkynes
3.6K
Aldehydes and ketones are prepared from alcohols, alkenes, and alkynes via different reaction pathways. Alcohols are the most commonly used substrates for synthesizing aldehydes and ketones. The conversion of alcohol to aldehyde, which involves the oxidation process, depends on the class of the alcohol used and the strength of the oxidizing agent. For instance, primary alcohol will form an aldehyde when treated with a weak oxidizing agent; however, it gets over-oxidized to a carboxylic acid in...
3.6K
01:21Radical Oxidation of Allylic and Benzylic Alcohols
2.0K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.0K
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.4K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.4K